#include <stdio.h>

void two();
void one_three();

void two()
{
    printf("two\n\n");
}

void one_three()
{
    printf("one\n\n");
    two();
    printf("three\n\n");
}

int main(void)
{
    printf("starting now:\n\n");
    one_three();
    printf("done!\n");
    
    return 0;
}
